Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

ABC91F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N859DN · BOEING 737-900 · operated by BANK OF UTAH TRUSTEE

Hex
ABC91F
Octal
52744437
Decimal
11,258,143
Country
US
Tail
N859DN
Type
B739
No current signal · last broadcast Jul 26, 21:45 UTC
Flights observed
550
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:45 UTC

Last known position

Most recent position reported by Mode-S ABC91F.

Country allocation

The ICAO 24-bit address ABC91F falls within the block assigned to United States (US) by ICAO Annex 10, Volume III. Every aircraft registered in United States receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 20 distinct

Callsign Airline Flights Last seen
DAL1147 Delta Air Lines 9 2026-06-09
DAL2211 - 8 2026-07-13
DAL1419 Delta Air Lines 8 2026-07-20
DAL2951 - 6 2026-07-08
DAL2070 Delta Air Lines 6 2026-04-18
DAL874 - 5 2026-07-03
DAL866 Delta Air Lines 5 2026-04-15
DAL801 - 5 2026-06-29
DAL3128 - 5 2026-07-10
DAL3109 Delta Air Lines 5 2026-06-09
DAL1947 Delta Air Lines 5 2026-06-02
DAL1816 - 5 2026-07-11
DAL1500 - 5 2026-07-12
DAL1013 - 5 2026-06-28
DAL851 Delta Air Lines 4 2026-04-30
DAL809 Delta Air Lines 4 2026-05-26
DAL517 Delta Air Lines 4 2026-06-08
DAL3169 - 4 2026-06-18
DAL3157 - 4 2026-06-29
DAL2999 Delta Air Lines 4 2026-06-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL1480 ATL → BOS Jul 26, 20:05 UTCJul 26, 21:40 UTC1h 35m
2026-07-26 DAL1520 DTW → ORD Jul 26, 15:45 UTCJul 26, 17:45 UTC2h 0m
2026-07-26 DAL1520 DTW → ORD Jul 26, 15:45 UTCJul 26, 18:06 UTC2h 21m
2026-07-26 DAL2347 RDU → BOS Jul 26, 11:30 UTCJul 26, 14:00 UTC2h 30m
2026-07-25 DAL2396 MSY → ATL Jul 25, 19:35 UTCJul 25, 21:45 UTC2h 10m
2026-07-25 DAL2396 MSY → ATL Jul 25, 19:31 UTCJul 25, 21:51 UTC2h 20m
2026-07-25 DAL2396 MSY → ATL Jul 25, 15:40 UTCJul 25, 18:00 UTC2h 20m
2026-07-25 DAL2723 BOS → MCO Jul 25, 11:35 UTCJul 25, 13:50 UTC2h 15m
2026-07-24 DAL2433 MSP → CLT Jul 24, 23:15 UTCJul 25, 01:50 UTC2h 35m
2026-07-24 DAL2195 ATL → AVL Jul 24, 18:55 UTCJul 24, 21:10 UTC2h 15m
2026-07-24 DAL2195 ATL → AVL Jul 24, 15:00 UTCJul 24, 17:20 UTC2h 20m
2026-07-24 DAL2387 SJC → SEA Jul 24, 10:40 UTCJul 24, 13:10 UTC2h 30m
2026-07-24 DAL1428 JFK → AUS Jul 24, 00:40 UTCJul 24, 03:00 UTC2h 20m
2026-07-23 DAL532 EWR → DTW Jul 23, 18:25 UTCJul 23, 21:35 UTC3h 10m
2026-07-23 DAL532 EWR → DTW Jul 23, 18:24 UTCJul 23, 21:25 UTC3h 1m
2026-07-23 DAL532 EWR → DTW Jul 23, 13:00 UTCJul 23, 16:50 UTC3h 50m
2026-07-23 DAL2500 ATL → CVG Jul 23, 00:30 UTCJul 23, 02:50 UTC2h 20m
2026-07-22 DAL2500 ATL → CVG Jul 22, 19:25 UTCJul 22, 22:05 UTC2h 40m
2026-07-22 DAL732 TPA → JFK Jul 22, 15:30 UTCJul 22, 17:45 UTC2h 15m
2026-07-22 DAL2042 JFK → TPA Jul 22, 11:40 UTCJul 22, 13:55 UTC2h 15m
2026-07-22 DAL1643 ATL → MSN Jul 22, 00:35 UTCJul 22, 04:00 UTC3h 25m
2026-07-21 DAL2323 BOS → JAX Jul 21, 16:45 UTCJul 21, 20:00 UTC3h 15m
2026-07-21 DAL2165 MIA → BOS Jul 21, 11:20 UTCJul 21, 13:45 UTC2h 25m
2026-07-21 DAL1414 ATL → BDL Jul 21, 01:40 UTCJul 21, 04:10 UTC2h 30m
2026-07-20 DAL305 HNL → JFK Jul 20, 20:30 UTCJul 20, 23:05 UTC2h 35m
2026-07-20 DAL305 HNL → JFK Jul 20, 20:30 UTCJul 20, 22:59 UTC2h 29m
2026-07-20 DAL305 HNL → JFK Jul 20, 15:30 UTCJul 20, 18:00 UTC2h 30m
2026-07-20 DAL1419 DTW → DEN Jul 20, 01:10 UTCJul 20, 03:55 UTC2h 45m
2026-07-19 DAL1419 DTW → DEN Jul 19, 20:25 UTCJul 19, 23:15 UTC2h 50m
2026-07-18 DAL1918 - Jul 18, 17:50 UTCJul 18, 19:55 UTC2h 5m
2026-07-18 DAL1918 NAS → JFK Jul 18, 17:23 UTCJul 18, 19:51 UTC2h 28m
2026-07-18 DAL1907 JFK → NAS Jul 18, 12:37 UTCJul 18, 15:01 UTC2h 24m
2026-07-18 DAL1907 - Jul 18, 12:40 UTCJul 18, 14:40 UTC2h 0m
2026-07-18 DAL1419 - Jul 18, 00:35 UTCJul 18, 03:10 UTC2h 36m
2026-07-18 DAL1419 FLL → JFK Jul 18, 00:30 UTCJul 18, 03:05 UTC2h 35m
2026-07-17 DAL1419 JFK → FLL Jul 17, 20:10 UTCJul 17, 22:29 UTC2h 20m
2026-07-17 DAL1422 - Jul 17, 15:29 UTCJul 17, 17:55 UTC2h 25m
2026-07-17 DAL1422 JFK → FLL Jul 17, 11:04 UTCJul 17, 13:25 UTC2h 20m
2026-07-17 DAL1419 - Jul 17, 00:25 UTCJul 17, 02:39 UTC2h 15m
2026-07-17 DAL1419 FLL → JFK Jul 17, 00:21 UTCJul 17, 02:41 UTC2h 20m
2026-07-16 DAL1419 JFK → FLL Jul 16, 20:19 UTCJul 16, 22:40 UTC2h 20m
2026-07-16 DAL732 TPA → JFK Jul 16, 15:45 UTCJul 16, 18:10 UTC2h 25m
2026-07-16 DAL2531 LGA → TPA Jul 16, 11:35 UTCJul 16, 14:26 UTC2h 51m
2026-07-16 DAL2531 LGA → TPA Jul 16, 11:34 UTCJul 16, 14:29 UTC2h 55m
2026-07-16 DAL2454 TPA → LGA Jul 16, 00:35 UTCJul 16, 03:05 UTC2h 30m
2026-07-16 DAL2454 TPA → LGA Jul 16, 00:32 UTCJul 16, 02:56 UTC2h 24m
2026-07-15 DAL2093 JFK → TPA Jul 15, 18:50 UTCJul 15, 21:00 UTC2h 10m
2026-07-15 DAL2380 ATL → JFK Jul 15, 15:20 UTCJul 15, 17:10 UTC1h 50m
2026-07-15 DAL2554 - Jul 15, 11:15 UTCJul 15, 11:45 UTC30m
2026-07-15 DAL2554 BDL → ATL Jul 15, 11:12 UTCJul 15, 13:04 UTC1h 52m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the N859DN page for operator, model, and routing details .

Mode-S ABC91F frequently asked

What is Mode-S code ABC91F?
ABC91F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N859DN.
Where is Mode-S ABC91F registered?
Mode-S code ABC91F is allocated to United States (US). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is ABC91F broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ABC91F, octal 52744437, decimal 11,258,143.
What flights does ABC91F operate?
Mode-S ABC91F has broadcast 20 distinct callsigns, including DAL1147, DAL2211, DAL1419, DAL2951, DAL2070.